USB: mon: use ktime_get_real_ts64 instead of getnstimeofday64

The two do the same thing, but we want to remove getnstimeofday64()
to have a more consistent interface.

It would be nice to use a monotonic clocksource here rather than
'real' time, but that would break the user interface.

Signed-off-by: Arnd Bergmann <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/mon/mon_bin.c

···
 	unsigned short busnum;	/* Bus number */
 	char flag_setup;
 	char flag_data;
-	s64 ts_sec;		/* getnstimeofday64 */
-	s32 ts_usec;		/* getnstimeofday64 */
+	s64 ts_sec;		/* ktime_get_real_ts64 */
+	s32 ts_usec;		/* ktime_get_real_ts64 */
 	int status;
 	unsigned int len_urb;	/* Length of data (submitted or actual) */
 	unsigned int len_cap;	/* Delivered length */
···
 	struct mon_bin_hdr *ep;
 	char data_tag = 0;
 
-	getnstimeofday64(&ts);
+	ktime_get_real_ts64(&ts);
 
 	spin_lock_irqsave(&rp->b_lock, flags);
 
···
 	unsigned int offset;
 	struct mon_bin_hdr *ep;
 
-	getnstimeofday64(&ts);
+	ktime_get_real_ts64(&ts);
 
 	spin_lock_irqsave(&rp->b_lock, flags);